The asexual pre-cyst development of Sarcocystis tenella in experimentally infected specific-pathogen-free lambs

Twenty-two lambs raised under sporozoa-free conditions were infected at weaning with 0.25–2.0 million Sarcocystis tenella sporocysts obtained from dogs and then necropsied at intervals between 1.3 h and 41 days post-inoculation (dpi). Fixed and frozen sections from 47 different tissues from each lam...

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